From: David FAHED (dfahed@xxxxxxxxxxxx)
Date: Wed Jan 17 2001 - 08:59:09 GMT-3
For the option subnet it's not necessary with default-information originate
because you announce a default so no need to have subnet.
The option always is useful when you have a flapping default route the ospf
still continue to announce the default route (use to prevent too much cpu
usage)?
For your problem :
r5 ---------IGRP /24--------------r8-loop2-/28
r5 doesn't see r8's loop2-/28 subnet.
Is this possible?
It is possible :
On R8 put a static route for loop2 with a mask of /24.
If the add of loop2 is 172.16.25.17/28
use a static route ip route 172.16.25.0 255.255.255.0 null0
Redistribute the static route on IGRP on R8.
You have to undestand how work classful protocol like RIPV1 and IGRP. (Good boo
k
is Routing TCP/IP Jeff doyle)
Steve Clubb wrote:
> David -
>
> Awesome! This worked!
>
> All OSPF can see IGRP, and vice versa. Thanks!
>
> By the way, there was no subnets option for ospf when using
> default-information originate. There was an 'always' option, which I used
> instead.
>
> I've got another challenge for you, if it's possible.
>
> Here's the scenario:
>
> r5 ---------IGRP /24--------------r8-loop2-/28
>
> r5 doesn't see r8's loop2-/28 subnet.
>
> Is this possible?
>
> Steve
>
> -----Original Message-----
> From: David FAHED [mailto:dfahed@outremer.com]
> Sent: Tuesday, January 16, 2001 3:30 PM
> To: Steve Clubb; ccielab@groupstudy.com
> Subject: Re: OSPF/IGRP redistribution and default-network
>
> For IGRP create a loopback with address 10.0.0.1/8 (or anything different of
> your assigned address)
> Put this loopback on the igrp process network 10.0.0.0
> and use the ip default-network 10.0.0.0
>
> For Ospf use the command default-information originate (is a specialized
> form of
> redistribute) causing a default route to be redistributed in OSPF.Replace
> the
> redistribute igrp 100 metric 100 metric-type 1 subnets with
> default-information
> originate metric 100 metric-type 1 subnets.
>
> Hope this help!
>
> Steve Clubb wrote:
>
> > Hey all -
> >
> > I have multiple routers, 1/2 OSPF and 1/2 IGRP. I want to redistribute
> OSPF
> > into IGRP w/o summerization.
> >
> > Caslow say we can redistribute w/summerization or by using
> default-networks.
> >
> > I'm trying to set up default-networks but am not successful. Any ideas?
> >
> > Thanks,
> >
> > Steve
> >
> > This is the redistributing router:
> >
> >
> > r5#
> > !
> > interface Loopback0
> > ip address 137.20.5.1 255.255.255.0
> > !
> > interface Loopback1
> > ip address 137.20.55.1 255.255.255.224
> > !
> > interface FastEthernet0/0
> > ip address 137.20.168.5 255.255.255.0
> > duplex auto
> > speed auto
> > !
> > interface Serial0/1
> > ip address 137.20.35.5 255.255.255.240
> > encapsulation frame-relay
> > ip ospf network point-to-multipoint
> > frame-relay map ip 137.20.35.1 205 broadcast
> > frame-relay map ip 137.20.35.3 205 broadcast
> > frame-relay lmi-type ansi
> > !
> > router ospf 10
> > log-adjacency-changes
> > area 1 range 137.20.5.0 255.255.255.0
> > area 1 virtual-link 137.20.1.1
> > area 5 range 137.20.55.0 255.255.255.224
> > redistribute igrp 100 metric 100 metric-type 1 subnets
> > network 137.20.5.0 0.0.0.255 area 1
> > network 137.20.35.0 0.0.0.15 area 1
> > network 137.20.55.0 0.0.0.63 area 5
> > !
> > router igrp 100
> > redistribute ospf 10 metric 1000 100 255 1 1500
> > passive-interface Serial0/0
> > passive-interface FastEthernet0/1
> > passive-interface Serial0/1
> > passive-interface Loopback0
> > passive-interface Loopback1
> > network 137.20.0.0
> > !
> > ip classless
> > ip default-network 137.20.0.0
> > !
> >
> >
> > r5#sir
> > Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> > E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> > i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
> > area
> > * - candidate default, U - per-user static route, o - ODR
> > P - periodic downloaded static route
> >
> > Gateway of last resort is not set
> >
> > * 137.20.0.0/16 is variably subnetted, 26 subnets, 5 masks
> > I 137.20.188.0/24 [100/610] via 137.20.168.8, 00:00:54,
> > FastEthernet0/0
> > C 137.20.168.0/24 is directly connected, FastEthernet0/0
> > I 137.20.166.0/24 [100/610] via 137.20.168.6, 00:00:34,
> > FastEthernet0/0
> > O E1 137.20.29.0/28 [110/228] via 137.20.35.1, 00:29:46, Serial0/1
> > O IA 137.20.30.0/24 [110/138] via 137.20.35.1, 00:29:46, Serial0/1
> > O E1 137.20.29.9/32 [110/228] via 137.20.35.1, 00:29:46, Serial0/1
> > O 137.20.22.0/28 [110/134] via 137.20.35.1, 00:29:47, Serial0/1
> > O 137.20.12.1/32 [110/64] via 137.20.35.1, 00:29:47, Serial0/1
> > O E1 137.20.12.0/24 [110/228] via 137.20.35.1, 00:29:47, Serial0/1
> > O 137.20.12.2/32 [110/128] via 137.20.35.1, 00:29:47, Serial0/1
> > O E1 137.20.9.0/28 [110/228] via 137.20.35.1, 00:29:47, Serial0/1
> > O IA 137.20.10.0/24 [110/74] via 137.20.35.1, 00:29:47, Serial0/1
> > O IA 137.20.4.1/32 [110/193] via 137.20.35.1, 00:29:47, Serial0/1
> > C 137.20.5.0/24 is directly connected, Loopback0
> > O 137.20.1.1/32 [110/65] via 137.20.35.1, 00:29:47, Serial0/1
> > O IA 137.20.3.0/24 [110/129] via 137.20.35.1, 00:29:47, Serial0/1
> > O 137.20.2.1/32 [110/129] via 137.20.35.1, 00:29:47, Serial0/1
> > O E1 137.20.2.0/24 [110/228] via 137.20.35.1, 00:29:47, Serial0/1
> > O 137.20.3.1/32 [110/129] via 137.20.35.1, 00:29:47, Serial0/1
> > C 137.20.55.0/27 is directly connected, Loopback1
> > O IA 137.20.44.0/28 [110/198] via 137.20.35.1, 00:29:48, Serial0/1
> > O IA 137.20.40.0/24 [110/202] via 137.20.35.1, 00:29:48, Serial0/1
> > O 137.20.35.3/32 [110/128] via 137.20.35.1, 00:29:48, Serial0/1
> > C 137.20.35.0/28 is directly connected, Serial0/1
> > O IA 137.20.34.0/29 [110/192] via 137.20.35.1, 00:29:48, Serial0/1
> > O 137.20.35.1/32 [110/64] via 137.20.35.1, 00:29:48, Serial0/1
> >
> >
> > IGRP router connected to router 5:
> >
> >
> > r8#sir
> > Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> > E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> > i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
> > area
> > * - candidate default, U - per-user static route, o - ODR
> > P - periodic downloaded static route
> >
> > Gateway of last resort is not set
> >
> > 137.20.0.0/16 is variably subnetted, 11 subnets, 2 masks
> > C 137.20.189.0/28 is directly connected, Loopback1
> > C 137.20.188.0/24 is directly connected, Loopback0
> > C 137.20.168.0/24 is directly connected, FastEthernet0/0
> > I 137.20.166.0/24 [100/610] via 137.20.168.6, 00:00:17,
> > FastEthernet0/0
> > I 137.20.30.0/24 [100/10110] via 137.20.168.5, 00:00:42,
> > FastEthernet0/0
> > I 137.20.12.0/24 [100/10110] via 137.20.168.5, 00:00:42,
> > FastEthernet0/0
> > I 137.20.10.0/24 [100/10110] via 137.20.168.5, 00:00:43,
> > FastEthernet0/0
> > I 137.20.5.0/24 [100/610] via 137.20.168.5, 00:00:43,
> FastEthernet0/0
> > I 137.20.3.0/24 [100/10110] via 137.20.168.5, 00:00:43,
> > FastEthernet0/0
> > I 137.20.2.0/24 [100/10110] via 137.20.168.5, 00:00:43,
> > FastEthernet0/0
> > I 137.20.40.0/24 [100/10110] via 137.20.168.5, 00:00:43,
> > FastEthernet0/0
> >
> >
> >
> > OSPF router connected to router 5:
> >
> >
> >
> > r1#sir
> > Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> > E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> > i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> > default
> > U - per-user static route, o - ODR
> >
> > Gateway of last resort is not set
> >
> > 137.20.0.0/16 is variably subnetted, 26 subnets, 5 masks
> > O E1 137.20.188.0/24 [110/164] via 137.20.35.5, 00:32:03, Serial0.35
> > O E1 137.20.168.0/24 [110/164] via 137.20.35.5, 00:32:03, Serial0.35
> > O E1 137.20.166.0/24 [110/164] via 137.20.35.5, 00:32:03, Serial0.35
> > O E1 137.20.29.0/28 [110/164] via 137.20.12.2, 00:50:14, Serial0.2
> > O IA 137.20.30.0/24 [110/74] via 137.20.35.3, 00:50:14, Serial0.35
> > O E1 137.20.29.9/32 [110/164] via 137.20.12.2, 00:50:14, Serial0.2
> > O 137.20.22.0/28 [110/70] via 137.20.12.2, 00:50:34, Serial0.2
> > C 137.20.12.0/24 is directly connected, Serial0.2
> > O 137.20.12.2/32 [110/64] via 137.20.12.2, 00:50:34, Serial0.2
> > O E1 137.20.9.0/28 [110/164] via 137.20.12.2, 00:50:14, Serial0.2
> > C 137.20.10.0/24 is directly connected, Ethernet0
> > O IA 137.20.4.1/32 [110/129] via 137.20.35.3, 00:50:14, Serial0.35
> > O IA 137.20.5.0/24 [110/65] via 137.20.35.5, 00:50:14, Serial0.35
> > O 137.20.5.1/32 [110/65] via 137.20.35.5, 00:50:35, Serial0.35
> > C 137.20.1.0/24 is directly connected, Loopback0
> > O IA 137.20.3.0/24 [110/65] via 137.20.35.3, 00:50:14, Serial0.35
> > O 137.20.2.1/32 [110/65] via 137.20.12.2, 00:50:35, Serial0.2
> > O E1 137.20.2.0/24 [110/164] via 137.20.12.2, 00:50:15, Serial0.2
> > O 137.20.3.1/32 [110/65] via 137.20.35.3, 00:50:35, Serial0.35
> > O IA 137.20.55.0/27 [110/65] via 137.20.35.5, 00:50:15, Serial0.35
> > O IA 137.20.44.0/28 [110/134] via 137.20.35.3, 00:50:15, Serial0.35
> > O IA 137.20.40.0/24 [110/138] via 137.20.35.3, 00:50:15, Serial0.35
> > O 137.20.35.5/32 [110/64] via 137.20.35.5, 00:50:35, Serial0.35
> > O 137.20.35.3/32 [110/64] via 137.20.35.3,
> > OSPF: rcv. v:2 t:1 l:48 rid:137.20.55.1
> > aid:0.0.0.1 chk:B11A aut:0 auk: from Serial0.35
> > OSPF: rcv. v:2 t:1 l:48 rid:137.20.55.1
> > aid:0.0.0.1 chk:B11A aut:0 auk: from Serial0.3500:50:35, Serial0.35
> > C 137.20.35.0/28 is directly connected, Serial0.35
> > O IA 137.20.34.0/29 [110/128] via 137.20.35.3, 00:50:16, Serial0.35
> >
> >
> > Steven Clubb
> > Network Engineer
> > <http://www.cattech.com/>
> > Phone:
> > 408.341.1722
> > Cell:
> > 408.568.8854
> > FAX:
> > 408.341.1720
> >
> > sclubb@cattech.com <mailto:sclubb@cattech.com>
> >
> >
> >
> >
> >
> >
> >
> >
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